demarest



(No Model.)

J. DEMAREST.

WATER CLOSET G'ISTERN.

No. 378,664. Patented Feb-28, 1888.

N. PETERS. Phuwumo n mr, Washingmn, v.0.

lUNiTE ll arnnir Urn-ion.

JOHN DEMAREST, OF NEW YORK, Y., ASSIGNOR TO THE J. L. MOTT IRON 'WORKS,OF SAME PLACE.

WATER CLQEBET GISTERN.

SPECIFICATION forming part of Letters Patent No. 878,66d, dated February28, 1888. Application filed May 17, 1886. Serial No. 202,352. No model.)

To all whom it may concern.-

Be it known that I, JOHN DEMAREST, of the city and State of New York,have invented an Improvement in \VatenOloset Gisterns, of

which the following is a specification.

This invention relates to that class of watercloset cisterns in whichthe water, as it flows to the closet, exhausts the air from thedischarge-pipe of the closet between the two IO traps, and thereby formsa siphon that draws the contents of the closet away rapidly. Thecisterns and flushing apparatus heretofore employed having these objectsin view are more or less complicated and difficult to keep in re- I 5pair. I

My present invention consists in the combination, with theexhausting-chamber and the pipe leading to the closet, of a valve andfloat constructed in such a manner that the valve will be sustained bythe float until after the air has been admitted into the exhaustingchamber of the closet, thereby insuring the proper flow of water forflushing the closetbasin after the siphon action has been interrupted bythe admission of the air.

In the drawings, Figure 1 is a vertical section of my improved cisternand valve and a portion of the closet with which it is conneeted, andFig. 2 is a sectional plan view at the line a;

The closet A, with the overflow-darn B and trap O, is of any desiredcharacter; and D is the suction-pipe through which the air is exhaustedto fill the siphon portion E and cause 5 the water to be drawn out ofthe basin A and discharged rapidly.

F is the flushing-pipe from the cistern G to the flushing-rim of thecloset.

H is the valve-seat within the closet-cistern I 0 at the top of thecoupling 1, that connects the flushing-pipe F with the cistern G.

L is a funnel-shaped exhauster within the coupling and extendingdownwardly from the seat H, and open at the lower end.

M is a lateral branch pipe connecting with the suction-pipe D where thesame passes up inside the cistern G, and there is a partition, N, andair-tight cover 0, forming an exhaustchamber, I, within which thepipe Drises, and is open at the upper end.

The valve-seat H is of a large diameter, and upon it rests the valve Qat the under side of the float R; and S is a guide-stem through a bridgewithin the valve-seat.

T is a cap at the upper end of the tube U within the float, and throughthis cap T passes the headed rod V; and W is the pull-lever throughwhich the rod V passes, and Z are lock-nuts on the said rod.

The float B is broad and shallow, and is of suflicient size to easilysustain the valve and its stem when the valve is raised from its seat;but, the valve-seat being of large diameter, the pressure of water willhold the float down as soon'as the valve rests upon the seat. 6

The water is to be supplied into the cistern by a cock and float in anyusual manner, and it rises around and submerges the float, and it alsorises in the exhaustchamber P, as the air therein is free to pass outthrough the upper part of the pipe D, the lateral branch M, and theflushingpipe F to the rim of the closet. When the closet-pull isoperated, the lever \V lifts the float It and valve Q, and the floatwill sustain the valve whether the lever WV is allowed to drop or not.The water now rushes through the valve-seat H and through the exhausterL, and the air is thereby drawn out of the lateral branch M, pipe D,chamber P, and siphon E of the closet, bringing the said siphon intoaction and rapidly discharging the contents of the closet A; and thisoperation is further promoted by the descent of the water in the cisternG and chamber P. As the water descends the float It also descends; butbefore the valve (,1 reaches its seat H the water has descended belowthe lower edge of the partition J, and thereby admitted air into thechamber I, suction-pipe D, and siphon E, instantly stopping the flow ofwater through the siphon E. The water now continues to run from thecistern G through the flushingpipe F to fill the bowl of the closet A upto the top of the overflowdain B, and the parts are so proportioned thatwhen this takes place the valve Q has descended to and rests upon theseat H, so that the parts assume their normal position, and the cisternis refilled by water admitted by the ball cock and valve, as usual.

I claim as my invention-- The combination, with the flushing-pipe F andan exhausting-pipe, D, leading to the 1886. closet, of a supply-cistern,G, and a minus pressure-chamber, P, into which the exhausting-pipe Dopens, a valve, Q, at the upper end of the flushing-pipe F, and a float,R, to hold Witnesses: up such valve until after the water has de- HENRYMORFORD, seended to admit air into the minus pressure- MAX GOEBEL.chamber 1?, substantially as set forth.

JO HN DEMAREST.

Signed by me this 11th day of May A. D. 10

